root/drivers/media/pci/cx23885/netup-init.c

DEFINITIONS

1. i2c_av_write
2. i2c_av_write4
3. i2c_av_read
4. i2c_av_and_or
5. netup_initialize

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * netup-init.c
   4  *
   5  * NetUP Dual DVB-S2 CI driver
   6  *
   7  * Copyright (C) 2009 NetUP Inc.
   8  * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
   9  * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
  10  */
  11 
  12 #include "cx23885.h"
  13 #include "netup-init.h"
  14 
  15 static void i2c_av_write(struct i2c_adapter *i2c, u16 reg, u8 val)
  16 {
  17         int ret;
  18         u8 buf[3];
  19         struct i2c_msg msg = {
  20                 .addr   = 0x88 >> 1,
  21                 .flags  = 0,
  22                 .buf    = buf,
  23                 .len    = 3
  24         };
  25 
  26         buf[0] = reg >> 8;
  27         buf[1] = reg & 0xff;
  28         buf[2] = val;
  29 
  30         ret = i2c_transfer(i2c, &msg, 1);
  31 
  32         if (ret != 1)
  33                 pr_err("%s: i2c write error!\n", __func__);
  34 }
  35 
  36 static void i2c_av_write4(struct i2c_adapter *i2c, u16 reg, u32 val)
  37 {
  38         int ret;
  39         u8 buf[6];
  40         struct i2c_msg msg = {
  41                 .addr   = 0x88 >> 1,
  42                 .flags  = 0,
  43                 .buf    = buf,
  44                 .len    = 6
  45         };
  46 
  47         buf[0] = reg >> 8;
  48         buf[1] = reg & 0xff;
  49         buf[2] = val & 0xff;
  50         buf[3] = (val >> 8) & 0xff;
  51         buf[4] = (val >> 16) & 0xff;
  52         buf[5] = val >> 24;
  53 
  54         ret = i2c_transfer(i2c, &msg, 1);
  55 
  56         if (ret != 1)
  57                 pr_err("%s: i2c write error!\n", __func__);
  58 }
  59 
  60 static u8 i2c_av_read(struct i2c_adapter *i2c, u16 reg)
  61 {
  62         int ret;
  63         u8 buf[2];
  64         struct i2c_msg msg = {
  65                 .addr   = 0x88 >> 1,
  66                 .flags  = 0,
  67                 .buf    = buf,
  68                 .len    = 2
  69         };
  70 
  71         buf[0] = reg >> 8;
  72         buf[1] = reg & 0xff;
  73 
  74         ret = i2c_transfer(i2c, &msg, 1);
  75 
  76         if (ret != 1)
  77                 pr_err("%s: i2c write error!\n", __func__);
  78 
  79         msg.flags = I2C_M_RD;
  80         msg.len = 1;
  81 
  82         ret = i2c_transfer(i2c, &msg, 1);
  83 
  84         if (ret != 1)
  85                 pr_err("%s: i2c read error!\n", __func__);
  86 
  87         return buf[0];
  88 }
  89 
  90 static void i2c_av_and_or(struct i2c_adapter *i2c, u16 reg, unsigned and_mask,
  91                                                                 u8 or_value)
  92 {
  93         i2c_av_write(i2c, reg, (i2c_av_read(i2c, reg) & and_mask) | or_value);
  94 }
  95 /* set 27MHz on AUX_CLK */
  96 void netup_initialize(struct cx23885_dev *dev)
  97 {
  98         struct cx23885_i2c *i2c_bus = &dev->i2c_bus[2];
  99         struct i2c_adapter *i2c = &i2c_bus->i2c_adap;
 100 
 101         /* Stop microcontroller */
 102         i2c_av_and_or(i2c, 0x803, ~0x10, 0x00);
 103 
 104         /* Aux PLL frac for 27 MHz */
 105         i2c_av_write4(i2c, 0x114, 0xea0eb3);
 106 
 107         /* Aux PLL int for 27 MHz */
 108         i2c_av_write4(i2c, 0x110, 0x090319);
 109 
 110         /* start microcontroller */
 111         i2c_av_and_or(i2c, 0x803, ~0x10, 0x10);
 112 }